Título:	Hydrogen and electricity at once : an alkaline-acidic ethanol electroreformer
Autor(es):	Amorim, Fernando M. de Lino Crisafulli, Rudy Linares Léon, José Joaquín
Afiliação do autor:	Universidade de Brasília, Instituto de Química Universidade de Brasília, Instituto de Química Universidade de Brasília, Instituto de Química
Assunto:	Etanol Hidrogênio Eletricidade
Data de publicação:	7-Fev-2023
Editora:	Elsevier B. V.
Referência:	AMORIM, Fernando M. de L.; CRISAFULLI, Rudy; LINARES, José J. Hydrogen and electricity at once: an alkaline-acidic ethanol electroreformer. Electrochemistry Communications, [S. l.], v. 148, 107452, mar. 2023. DOI: https://doi.org/10.1016/j.elecom.2023.107452. Disponível em: https://www.sciencedirect.com/science/article/pii/S1388248123000267?via%3Dihub. Acesso em: 11 out. 2024.
Abstract:	This study presents the results of an alkaline-acidic ethanol electroreformer producing hydrogen and electricity simultaneously. This is due to the pH gradient between an alkaline anolyte/fuel (1 mol/L ethanol and 4 mol/L KOH) and an acidic catholyte/comburent (1 mol/L H2SO4), separated by a K+-pretreated Nafion® 211 membrane to prevent chemical neutralization, resulting in an extra electromotive force. At 70 °C, the electroreformer delivers a maximum power density of 23 mW cm−2. An increase in the flow rate from 0.17 to 1.12 mL min−1 is also beneficial due to the mass transport enhancement. Finally, over the stability tests for 3 h at 50 °C and a flow rate of 1.12 mL min−1, it is possible to produce H2 at an average rate of 0.218 and 0.267 STP m3 m-2h−1, and an average energy of 0.0877 and 0.0997 kWh m−2 in recirculation and single-pass mode, respectively. The worse performance in the recirculation mode seems to be due to the accumulation of the ethanol electro-oxidation products, resulting in the poisoning of the catalyst surface.
Unidade Acadêmica:	Instituto de Química (IQ)
Licença:	This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
DOI:	https://doi.org/10.1016/j.elecom.2023.107452
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